Area Forecast Discussion
Issued by NWS St. Louis, MO

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FXUS63 KLSX 261040
AFDLSX

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
540 AM CDT Mon Jun 26 2017

.SHORT TERM...  (Through Late Tonight)
Issued at 216 AM CDT Mon Jun 26 2017

Shortwave and associated cloud cover/showers developing ahead of it
evident on satellite/regional radar this morning across the northern
Plains and upper Midwest.  This feature will move south and bring
scattered showers and isolated thunderstorms to the CWA today. Think
greatest coverage will be this afternoon when diurnal heating aids
convective development. Have gone on warmer side of guidance for
temperatures given yesterdays highs and sunshine expected this
morning.

Any lingering convection should diminish quickly this evening with
loss of daytime heating and the shortwave exiting the region.
Temperatures will once again cool into the 50s areawide.

Sieveking

.LONG TERM...  (Tuesday through Sunday)
Issued at 216 AM CDT Mon Jun 26 2017

Upper level ridge to build in on Tuesday, so will see one more dry
and cooler day before going back to more summer like conditions for
the rest of the forecast period.

By Wednesday, upper level flow becomes zonal with active period
moving in. Will see several rounds of storms from Wednesday
afternoon through the rest of the forecast period. However, it will
not be continuous rain. First system on Wednesday will slowly drag a
frontal boundary south into forecast area. With upper flow being
zonal, boundary to stall out and will have the potential for locally
heavy rainfall for areas along and north of Interstate 70 through
Friday. The best chances will be from Thursday afternoon through
Friday.

By the weekend, upper level trof builds in allowing system to
finally push through region. Will still have chances of showers and
storms though.

As for temperatures, will see them moderate from mid week on with
highs back in the mid to upper 80s. Then dip back down a bit below
normal for the weekend.

Byrd

&&

.AVIATION...  (For the 12z TAFs through 12z Tuesday Morning)
Issued at 537 AM CDT Mon Jun 26 2017

VFR conditions are anticipated for the forecast period. An upper
level disturbance will bring isolated to scattered showers and
thunderstorms to the region this afternoon and early this evening.
A light southwest wind will become northerly in the wake of the
systems cold front. Could see some fog develop late tonight and
early tomorrow morning across portions of northeast MO and west
central IL where surface high will reside, but those locations
will need some rain for that to occur.

SPECIFICS FOR KSTL:
VFR conditions expected with a few showers and storms this
afternoon and early evening. Light west southwest wind today.

CVKING

&&

.PRELIMINARY POINT TEMPS/POPS...
Saint Louis     83  57  81  65 /  40  20   0   0
Quincy          73  51  78  62 /  40  20   0   0
Columbia        78  54  79  64 /  40  20   0   0
Jefferson City  78  55  81  65 /  40  20   0   0
Salem           78  55  78  59 /  30  20   0   0
Farmington      81  55  80  60 /  40  20   0   0

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

$$

WFO LSX


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